南水北调与水利科技2012，Vol.10Issue(3)：133-136,4.DOI:10.3724/SP.J.1201.2012.03133
位移反分析在地下厂房开挖中的应用
Application of Displacement Back Analysis in the Excavation of Underground Powerhouse
摘要
Abstract
The excavation and support processes of the underground caverns in the Guandi Hydropower Project are simulated by the elastic-plastic finite element method using FLAC3D. Based on the measured deformations of the surrounding rocks in the underground powerhouse during the excavation, the deformation modulus of the surrounding rocks is back analyzed using the BP networks and genetic algorithms,and the estimated deformation modulus is used to predict the future deformations of the underground caverns during the following excavation. The results show that the application of the BP networks and genetic algorithms can accelerate the process of back analysis. The deformation modulus of the rocks is 19. 95 GPa according to the back a-nalysis,and it is in the range of the suggested values. The predicted displacements of the underground caverns during the future excavation using the inversely estimated parameters are similar to the measured displacements. Therefore, the back analysis method is reasonable and can provide references for the deformation prediction of similar excavation projects.关键词
地下厂房/位移反分析/FLAC3D/变形/预测Key words
underground powerhouse/ displacement back analysis /FLAC3D/ deformation /prediction分类
土木建筑引用本文复制引用
高春玉,魏进兵,裴建良..位移反分析在地下厂房开挖中的应用[J].南水北调与水利科技,2012,10(3):133-136,4.基金项目
国家重点基础研究发展规划(973)项目(2011CB201201) （973）
